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CVE-2026-5588GHSA-WG6Q-6289-32HP

PKIX draft CompositeVerifier accepts empty signature sequence as valid.

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 1.80.2, 1.81.1, 1.84, 2.0.11, 2.1.11, and 1 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules), Legion of the Bouncy Castle Inc. BCPKIX-FIPS bcpkix on All (pkix modules), Legion of the Bouncy Castle Inc. BCPIX-LTS bcpkix on All (pkix modules). This vulnerability is associated with program files JcaContentVerifierProviderBuilder.Java, JcaContentVerfierProviderBuilder.Java. This issue affects BC-JAVA: from 1.67 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84; BCPKIX-FIPS: from 2.0.6 before 2.0.11, from 2.1.7 before 2.1.11; BCPIX-LTS: from 2.73.7 before 2.73.11.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • bcpkix

    From 1.67 · fixed in 1.80.2; From 1.81 · fixed in 1.81.1; From 1.82 · fixed in 1.84

  • bcpkix

    From 2.0.6 · fixed in 2.0.11; From 2.1.7 · fixed in 2.1.11

  • bcpkix

    From 2.73.7 · fixed in 2.73.11

  • org.bouncycastle:bcpkix-jdk18onMaven

    From 1.49 · fixed in 1.84

  • org.bouncycastle:bcpkix-jdk15to18Maven

    From 1.49 · fixed in 1.84

  • org.bouncycastle:bcpkix-jdk15onMaven

    From 1.49 · fixed in 1.84

  • org.bouncycastle:bcpkix-jdk14Maven

    From 1.49 · fixed in 1.84

  • org.bouncycastle:bcpkix-debug-jdk18onMaven

    From 1.49 · fixed in 1.84

  • org.bouncycastle:bcpkix-debug-jdk15to18Maven

    From 1.49 · fixed in 1.84

  • org.bouncycastle:bcpkix-debug-jdk14Maven

    From 1.49 · fixed in 1.84

References 2

GitHub · bcgit/bc-java